// Copyright 2011 David Galles, University of San Francisco. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those of the
// authors and should not be interpreted as representing official policies, either expressed
// or implied, of the University of San Francisco
import { Hash } from "@/components/algorithm/Hash";


export class OpenHash extends Hash {
    constructor(am, w, h) {
        super();
        this.init(am, w, h);

    }
    init(am, w, h) {
        super.init.call(this, am, w, h);
        this.nextIndex = 0;
        this.POINTER_ARRAY_ELEM_Y = h - POINTER_ARRAY_ELEM_WIDTH;
        this.setup();
    }
    addControls() {
        super.addControls.call(this);

        // Add new controls
    }
    insertElement(elem) {
        this.commands = new Array();
        this.cmd("SetText", this.ExplainLabel, "Inserting element: " + String(elem));
        var index = this.doHash(elem);
        var node = new LinkedListNode(elem, this.nextIndex++, 100, 75);
        this.cmd("CreateLinkedList", node.graphicID, elem, LINKED_ITEM_WIDTH, LINKED_ITEM_HEIGHT, 100, 75);
        if (this.hashTableValues[index] != null && this.hashTableValues[index] != undefined) {
            this.cmd("connect", node.graphicID, this.hashTableValues[index].graphicID);
            this.cmd("disconnect", this.hashTableVisual[index], this.hashTableValues[index].graphicID);
        }

        else {
            this.cmd("SetNull", node.graphicID, 1);
            this.cmd("SetNull", this.hashTableVisual[index], 0);
        }
        this.cmd("connect", this.hashTableVisual[index], node.graphicID);
        node.next = this.hashTableValues[index];
        this.hashTableValues[index] = node;

        this.repositionList(index);

        this.cmd("SetText", this.ExplainLabel, "");

        return this.commands;

    }
    repositionList(index) {
        var startX = POINTER_ARRAY_ELEM_START_X + index * POINTER_ARRAY_ELEM_WIDTH;
        var startY = this.POINTER_ARRAY_ELEM_Y - LINKED_ITEM_Y_DELTA;
        var tmp = this.hashTableValues[index];
        while (tmp != null) {
            tmp.x = startX;
            tmp.y = startY;
            this.cmd("Move", tmp.graphicID, tmp.x, tmp.y);
            startY = startY - LINKED_ITEM_Y_DELTA;
            tmp = tmp.next;
        }
    }
    deleteElement(elem) {
        this.commands = new Array();
        this.cmd("SetText", this.ExplainLabel, "Deleting element: " + elem);
        var index = this.doHash(elem);
        if (this.hashTableValues[index] == null) {
            this.cmd("SetText", this.ExplainLabel, "Deleting element: " + elem + "  Element not in table");
            return this.commands;
        }
        this.cmd("SetHighlight", this.hashTableValues[index].graphicID, 1);
        this.cmd("Step");
        this.cmd("SetHighlight", this.hashTableValues[index].graphicID, 0);
        if (this.hashTableValues[index].data == elem) {
            if (this.hashTableValues[index].next != null) {
                this.cmd("Connect", this.hashTableVisual[index], this.hashTableValues[index].next.graphicID);
            }

            else {
                this.cmd("SetNull", this.hashTableVisual[index], 1);
            }
            this.cmd("Delete", this.hashTableValues[index].graphicID);
            this.hashTableValues[index] = this.hashTableValues[index].next;
            this.repositionList(index);
            return this.commands;
        }
        var tmpPrev = this.hashTableValues[index];
        var tmp = this.hashTableValues[index].next;
        var found = false;
        while (tmp != null && !found) {
            this.cmd("SetHighlight", tmp.graphicID, 1);
            this.cmd("Step");
            this.cmd("SetHighlight", tmp.graphicID, 0);
            if (tmp.data == elem) {
                found = true;
                this.cmd("SetText", this.ExplainLabel, "Deleting element: " + elem + "  Element deleted");
                if (tmp.next != null) {
                    this.cmd("Connect", tmpPrev.graphicID, tmp.next.graphicID);
                }

                else {
                    this.cmd("SetNull", tmpPrev.graphicID, 1);
                }
                tmpPrev.next = tmpPrev.next.next;
                this.cmd("Delete", tmp.graphicID);
                this.repositionList(index);
            }

            else {
                tmpPrev = tmp;
                tmp = tmp.next;
            }
        }
        if (!found) {
            this.cmd("SetText", this.ExplainLabel, "Deleting element: " + elem + "  Element not in table");
        }
        return this.commands;

    }
    findElement(elem) {
        this.commands = new Array();
        this.cmd("SetText", this.ExplainLabel, "Finding Element: " + elem);

        var index = this.doHash(elem);
        var compareIndex = this.nextIndex++;
        var found = false;
        var tmp = this.hashTableValues[index];
        this.cmd("CreateLabel", compareIndex, "", 10, 40, 0);
        while (tmp != null && !found) {
            this.cmd("SetHighlight", tmp.graphicID, 1);
            if (tmp.data == elem) {
                this.cmd("SetText", compareIndex, tmp.data + "==" + elem);
                found = true;
            }

            else {
                this.cmd("SetText", compareIndex, tmp.data + "!=" + elem);
            }
            this.cmd("Step");
            this.cmd("SetHighlight", tmp.graphicID, 0);
            tmp = tmp.next;
        }
        if (found) {
            this.cmd("SetText", this.ExplainLabel, "Finding Element: " + elem + "  Found!");
        }

        else {
            this.cmd("SetText", this.ExplainLabel, "Finding Element: " + elem + "  Not Found!");

        }
        this.cmd("Delete", compareIndex);
        this.nextIndex--;
        return this.commands;
    }
    setup() {
        this.hashTableVisual = new Array(HASH_TABLE_SIZE);
        this.hashTableIndices = new Array(HASH_TABLE_SIZE);
        this.hashTableValues = new Array(HASH_TABLE_SIZE);

        this.indexXPos = new Array(HASH_TABLE_SIZE);
        this.indexYPos = new Array(HASH_TABLE_SIZE);

        this.ExplainLabel = this.nextIndex++;

        this.table_size = HASH_TABLE_SIZE;

        this.commands = [];
        for (var i = 0; i < HASH_TABLE_SIZE; i++) {
            var nextID = this.nextIndex++;

            this.cmd("CreateRectangle", nextID, "", POINTER_ARRAY_ELEM_WIDTH, POINTER_ARRAY_ELEM_HEIGHT, POINTER_ARRAY_ELEM_START_X + i * POINTER_ARRAY_ELEM_WIDTH, this.POINTER_ARRAY_ELEM_Y);
            this.hashTableVisual[i] = nextID;
            this.cmd("SetNull", this.hashTableVisual[i], 1);

            nextID = this.nextIndex++;
            this.hashTableIndices[i] = nextID;
            this.indexXPos[i] = POINTER_ARRAY_ELEM_START_X + i * POINTER_ARRAY_ELEM_WIDTH;
            this.indexYPos[i] = this.POINTER_ARRAY_ELEM_Y + POINTER_ARRAY_ELEM_HEIGHT;
            this.hashTableValues[i] = null;

            this.cmd("CreateLabel", nextID, i, this.indexXPos[i], this.indexYPos[i]);
            this.cmd("SetForegroundColor", nextID, INDEX_COLOR);
        }
        this.cmd("CreateLabel", this.ExplainLabel, "", 10, 25, 0);
        this.animationManager.StartNewAnimation(this.commands);
        this.animationManager.skipForward();
        this.animationManager.clearHistory();
        this.resetIndex = this.nextIndex;
    }
    resetAll() {
        var tmp;
        this.commands = super.resetAll.call(this);
        for (var i = 0; i < this.hashTableValues.length; i++) {
            tmp = this.hashTableValues[i];
            if (tmp != null) {
                while (tmp != null) {
                    this.cmd("Delete", tmp.graphicID);
                    tmp = tmp.next;
                }
                this.hashTableValues[i] = null;
                this.cmd("SetNull", this.hashTableVisual[i], 1);
            }
        }
        return this.commands;
    }
    // NEED TO OVERRIDE IN PARENT
    reset() {
        for (var i = 0; i < this.table_size; i++) {
            this.hashTableValues[i] = null;
        }
        this.nextIndex = this.resetIndex;
        super.reset.call(this);
    }
    resetCallback(event) {
    }
    /*this.nextIndex = 0;
     this.commands = [];
     this.cmd("CreateLabel", 0, "", 20, 50, 0);
     this.animationManager.StartNewAnimation(this.commands);
     this.animationManager.skipForward();
     this.animationManager.clearHistory(); */
    disableUI(event) {
        super.disableUI.call(this);
    }
    enableUI(event) {
        super.enableUI.call(this);
    }
}


var POINTER_ARRAY_ELEM_WIDTH = 70;
var POINTER_ARRAY_ELEM_HEIGHT = 30;
var POINTER_ARRAY_ELEM_START_X = 50;

var LINKED_ITEM_HEIGHT = 30;
var LINKED_ITEM_WIDTH = 65;

var LINKED_ITEM_Y_DELTA = 50;
var LINKED_ITEM_POINTER_PERCENT = 0.25;

var MAX_DATA_VALUE = 999;

var HASH_TABLE_SIZE = 13;

var ARRAY_Y_POS = 350;


var INDEX_COLOR = "#0000FF";


class LinkedListNode {
    constructor(val, id, initialX, initialY) {
        this.data = val;
        this.graphicID = id;
        this.x = initialX;
        this.y = initialY;
        this.next = null;

    }
}
